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Gorin, A. M.; Evdokimov, S. V.; Zaitsev, A. A.; Izucheev, V. I.; Polishchuk, B. V.; Romanishin, K. A.; Rykalin, V. I.; Sadovsky, S. A.; Kharlov, Yu. V.; Shangaraev, A. A.
JETP letters, 11/2023, Letnik: 118, Številka: 9Journal Article
Studies at the Nuclotron in JINR indicate the presence of a previously unknown resonance-like structure in the two-photon mass spectrum in the region of 300–400 MeV/ c 2 , observed in nucleus–nucleus interactions. The goal of this work is to search for such structures in the two-photon mass spectrum in meson–nuclear interactions at a momentum of 7 GeV/ c at the Hyperon-M experiment of the U-70 accelerator complex. An upper limit has been established on the ratio of the cross section for the formation of unknown resonance structures to the cross section for the production of -meson at the 95% confidence level.
